Agree with lightning warp.
Since it's pre-cast, not even a "silence" curse can stop you from getting away.

Traps on the ground before you open it help cut the enemy numbers down as well. I'm also fairly fond of dropping a Freeze Mine, then spamming detonate right after I open it. A few enemies get through, but it usually works well enough to not die in a big initial spike of damage before the fps returns to normal.

If you were helped, please pay it forward.
"Fun" is not a winner-takes-all game.

I'm lol right now, this is ridiculous. I cast level 16 vaal molten shell and I have devouring totem setup to eat the 20 or so bodies i just killed at the foot of the box. I open box and try to leap slam away but I desync and I'm still dead. What a freaking joke. There has to be a 1 second wait period or something.